Ratchet-brace



(No Model.)

J. HERM.l RATGH'ET BRAGE.

No. 429,525. y Patented Jun@ 3, 1890.

:5, li?. i.

Attorneys me mams versus col, moro-mno., wAsmNcn'cu, u. c,

UNITED STATES PATENT OFFICE.

JOSEPH HERM, OF BIRMINGHAM, ALABAMA.

RATCH ET-BRAC E.

SPECIFICATION forming part of Letters Patent No. 429,525, dated June 3,1890.

Application filed November 14, 1888. Serial No. 290,776. (No model.)

To all whom it may concern.-

Be it known that I, JOSEPH HEEM, a citizen of the United States,residing at Birmingham, 1n the county of Jefferson and State of Alabama,have invented certain new and useful Improvements in Ratchet-Braces; andI do declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which 1tappertains to make and use thesame. reference being had to theaccompanying drawings, and to the letters of reference marked hereon,which form a part of this specificaion.

My invention relates to an improvement in' ratchet-braces; and itconsists in the peculiar construction and combination of devices thatwill be more fully set forth hereinafter, and particularly pointed outin the claims Ahereto appended. A

In the drawings which form part of this specificatiomFigure 1 is a sideelevation of a drill-brace and countersink -bit embodying myimprovements. Fig. 2 is adetail elevation of the ratchet-section. Fig. 3is a similar view of the bit-head. Fig. 4 is a similar view of a handleadapted to be used in lieu of the sweep-brace in contracted places. Fig.5 is aV detached horizontal section taken on the dotted line X X of Fig.l. Fig. 6 is a detached plan view of the countersink.

A represents the sweep-brace, which is of the usual form and has theusual swiveled bearing-knob B at its outer end and the usual swiveledsleeve C on its crank or sweep. .The inner arm D of the brace is squaredin crosssection, as at E, for a suitable distance from its end.

F represents an arm of the head I, which is provided with a longitudinalsquare opening of suitable length, into which is placed the square endof the arm D, as shown in Fig. 5. The head I is provided with ahorizontal opening or slot, in which the ratchet-wheel K is placed, andin which the pawls H, which engage the said ratchet-wheel, are pivoted.Placed in openin gs made in the inner ends of these pawls is a spiralspring a, for causing the said pawls to engage the ratchet-Wheel K.Passed loosely around the arm F of the head I is a collar or sleeve L,which is provided with a projection or enlarged portion b, which isrevolved upon the said arm, and the proj ection or enlargement thus madeto engage either of the pawls H desired, whereby it is held out ofcontact with the ratchet-wheel K. A circular bore is madetransverselythrough the head I and ratchet-Wheel K, and through thisbore is passed the spindle IWI, which is held therein by means of ascrew which passes through the ratchet-wheel into the spindle, and whichserves to secure the same firmly to the head.

A beveled gear-wheel O is slipped on the spindle, and has at one side astud P, which engages a notch R in the arm, and thereby the saidgear-wheel is locked to the brace and caused to rotate therewith.

. S represents the presser stem or arm, which has at its outer end aswiveled knob T, and is provided at its inner end with a central bore. Atransverse opening is made through the said section, and the same isslipped on the spindle M and caused to bear against the outer side ofthe gear-wheel O, and is held in place by a nut U, which is screwed onthe extreme end of the spindle.

X represents a spindle, which has the reduced portion W, which passesinto a longitudinal bore made in the inner end of the presser-stem S;also made in the inner end of the stem and communicating with the saidlongitudinal bore is a transverse recess cl, in which is placed a wheelor disk e, through which the inner end of the reduced portion IV of thespindle X passes, and which is secured thereto by means of a screw Z. Bythis construction the Wheel e secures the spindle X securely in place,and at the same time allows it to freely revolve. Secured upon thespindle X at its inner end is a beveled gear which engages with thebeveled gear O, and through the medium pf these two gears a revolvingmovement is imparted to the spindle. The spindleis provided with alongitudinal bore at its outer end for the reception of the tool R', andwith longitudinal slits, which allow it to open and close upon the innerend of said tool. Screw-threads f are formed upon the said spindle nearits center. Passing over the said Spindle is the clamping-sleeve V,which is provided with IOO screw-threads corresponding` to those uponthe spindle, and by turning the sleeve its outer end is made to closethe outer end of the spindle, and thusclamp the tool in the usualmanner.

A represents a bracket that has an open ing B' of sufficient size toadmit the spindle X, and an opening C' of reduced diameter. A screw D'Works in the said bracket and engages the spindle, and therebyclamps thebracket rmly thereto.

A sleeve E' has one end iitted in the opening C', and isprovided nearthe opposite end with a set-screw F.

G' represents a rod, which passes through the sleeve E', and has at itsouter end a right-angled gage-arm H. A bracket I' is clamped to the rodby a screw K', and extending from the bracket is a bearing-sleeve L',which is parallel with the gage-rod. The outer end of the said sleeve isconical in shape7 and one portion thereof is cut away, as shown in Fig.G.

N' represents a triangular cutter, which is secured to the sleeve by ascrew O', is arranged over the recess M', and has a triangular extendedcutting'point P'.

R represents the bit, which is socketed in thespindle, passes throughthe sleeve L', and projects beyond the point thereof a suitabledistance, this being regulated by ad justing the bracket I in or out onthe gage-rod. The latter may be adjusted according to the desired depthof the hole to be drilled by loosening the screws F' and K' and movingsaid gage-rod in the bracket I' and sleeve E'.

A collar S' is fitted in a transverse central opening in the sleeve L',encompasses the drill-bit, and has a threaded stud that projects throughan opening in one side of the sleeve. A clam ping-nut T is screwed tosaid stud and serves to clamp the bit in the sleeve. Then the device isthus arranged, as shown in Fig. l, the operator presses with his bodyagainst the knob T and applies thel point of the 4bit to the material tobe drilled. He grasps the knob B with one hand and grasps the sleeve Cwith the other hand and rotates the brace and the beveled wheel O. Thelatter, through the pinion Y, imparts accelerated rotary motion to thebithead, the bit, and the sleeve L', and causes the gage-rod to Whirlaround With the same. The bit serves to drill the opening, the cutter N'forms the countersink, and the gage de termines the depth of theopening, as will be readily understood.

lVhen itis desirable to dispense with the beveled gears, the spindle Wmay be inserted directly in the transverse opening in the head I, andsecured by the screw Which passes through the ratchet-Wheel K, therebyadapting the brace to be usedin the usual manner.

The handle shown in Fig. 4 may be used instead of the brace by insertingits rightangled arm U' in the collar F.

Having thus described lnyinvention, what I claim, and desire to secureby Letters Patent of the United States, is

l. The combination of the presser-stem having a longitudinal opening inits front end andan opening in rear thereof which passes transverselythrough the stem, a toolspindle having its inner end loosely secured inthe said longitudinal opening, a spindle passing through the saidtransverse opening, a bevel-gear placed on one end thereof, anoperating-arm secured to the said spindle outside of the said gear, anut upon the opposite end of the spindle, and a bevel-gear secured tothe tool-spindle, which engages the gear upon the transverse spindle,substantially as shown.

2. The combination of the presser-stem having a longitudinal opening inits front end, a transverse opening in rear thereof, the tool-spindleloosely secured in said lon gitudinal opening, a spindle passing throughsaid transverse opening, a bevel gear placed loosely on said spindlehaving a projection, an operating-head secured to said spindle having acavity engaged by said projection, and a gear upon the clamping-spindleengaging the gear upon the transverse spindle, substantially asspecified.

In testimony whereof I affix my signature in presence of t\vo Witnesses.

JOSEPH IlERM.

lVitnesses:

ROBERT TURTON, HARRY W. MYERs.

